Of cigarettes and leisurely computing.

Smoking in bed with a laptop leads to many a cigarette tumbling from the ashtray onto either the floor, the lower bookshelf, the box spring, or parts unknown.

This is especially, if unrealistically, dangerous when you've got a Kalashnikov with a full magazine propped against the wall between your bed and the bookcase. Dangerous because in some alternate movie-like universe the cigarette could fall onto the magazine and manage to heat it to the point where one or more of the rounds therein would explode. Unrealistic because, well, shit, physics pretty much prevents such a thing from happening, as does my preternatural ability to snatch burning butts from places they belong before they cause damage (assuming I'm not drunk and/or distracted, which explains the cigarette burns on the carpet at my prior domicile at Melrose Place).